This plug-in is also helpful to setup WordPress a CMS. It is called the Category Posts Plug-in.
What it does is allow you to display post titles for a single category in your sidebar.
The use for this is that you can have a "News" section and have just the posts for the category "News".
You can also use it multiple times for multiple categories (news, projects, resources, etc).
Here is the link - http://watershedstudio.com/portfolio/software/wp-category-posts.html
WordPress is great as a CMS.